Robotic Materials Conference Paper 2008

Cellular Ferroelectrets for Electroactive Polymer Hybrid Systems: Soft Matter Integrated Devices with Advanced Functionality

Thumb ticker sm keplinger christoph geringauflo  send
Robotic Materials, Physical Intelligence
Managing Director

Thin polymer foams with a closed cell void-structure can be internally charged by silent or partial discharges within the voids. The resulting material, which carries positive and negative charges on the internal void surfaces is called a ferroelectret. Ferroelectrets behave like typical ferroelectrics, hence they provide a novel class of ferroic materials. The soft foams are strongly piezoelectric in the 3-direction, but show negligible piezoelectric response in the transverse direction. This, together with a very low pyroelectric coefficient, make ferroelectrets highly suitable for flexible electroactive transducer element which can be integrated in thin bendable organic electronic devices. Here we describe some fundamental characteristics of cellular ferroelectrets and present a number of promising examples for a possible combination with various functional polymer systems. Our examples focus on flexible ferroelectret field-effect transistor systems for large-area sensor skins and microphones, flexible large-array position detectors (touchpad), and stretchable large-array pressure sensors.

Author(s): Reinhard Schwödiauer and Ingrid Graz and Martin Kaltenbrunner and Christoph Keplinger and Petr Bartu and Gerda Buchberger and Christoph Ortwein and Siegfried Bauer
Book Title: Proceedings of the SPIE Vol. 6927
Pages: 69270Q 1-10
Year: 2008
Month: April
Bibtex Type: Conference Paper (inproceedings)
Address: San Diego, USA
DOI: 10.1117/12.779363
State: Published
Electronic Archiving: grant_archive

BibTex

@inproceedings{Keplinger08-SSMNEHM-Ferroelectrets,
  title = {Cellular Ferroelectrets for Electroactive Polymer Hybrid Systems: Soft Matter Integrated Devices with Advanced Functionality},
  booktitle = {Proceedings of the SPIE Vol. 6927 },
  abstract = {Thin polymer foams with a closed cell void-structure can be internally charged by silent or partial discharges
  within the voids. The resulting material, which carries positive and negative charges on the internal void surfaces
  is called a ferroelectret. Ferroelectrets behave like typical ferroelectrics, hence they provide a novel class of ferroic
  materials. The soft foams are strongly piezoelectric in the 3-direction, but show negligible piezoelectric response
  in the transverse direction. This, together with a very low pyroelectric coefficient, make ferroelectrets highly
  suitable for flexible electroactive transducer element which can be integrated in thin bendable organic electronic
  devices. Here we describe some fundamental characteristics of cellular ferroelectrets and present a number of
  promising examples for a possible combination with various functional polymer systems. Our examples focus on
  flexible ferroelectret field-effect transistor systems for large-area sensor skins and microphones, flexible large-array
  position detectors (touchpad), and stretchable large-array pressure sensors.},
  pages = {69270Q 1-10},
  address = {San Diego, USA},
  month = apr,
  year = {2008},
  slug = {keplinger08-ssmnehm-ferroelectrets},
  author = {Schw{\"o}diauer, Reinhard and Graz, Ingrid and Kaltenbrunner, Martin and Keplinger, Christoph and Bartu, Petr and Buchberger, Gerda and Ortwein, Christoph and Bauer, Siegfried},
  month_numeric = {4}
}